W32.22-1050-09
1 | Air suspension bellows | 3 | Clamp | B20 | Left drive axle pressure sensor (only with code J3Z (Axle load measuring system) or code Q3Z (Frame lowering, with residual bellows pressure regulation) or code S1F (Roll Control Assist)) | ||
2 | Compressed air connector | 4 | Pin | B21 | Right drive axle pressure sensor (only with code J3Z (Axle load measuring system) or code Q3Z (Frame lowering, with residual bellows pressure regulation) or code S1F (Roll Control Assist)) |
Danger | Risk of death from lowering vehicle when working between wheels and body. Risk of injury from pinching or crushing when working on the air suspension. | Testing and repair work between the wheel and wheel arch or in the wheel well should only be performed if the vehicle is secured using suitable support fixtures to prevent it from lowering. | |
Danger | Risk of death caused by vehicle slipping or toppling off during lifting | Only lift vehicle at the lift support points specified by the vehicle manufacturer. | |
Topical note | Special instructions for lifting and supporting vehicle | ||
Notes on compressed air connection systems | |||
| Remove | ||
1 | Secure vehicle with wheel chocks to prevent it from rolling | ||
2 | Switch on ignition | ||
3 | Lower vehicle fully using level control system operating unit | After lowering, the vehicle frame must be resting on the rubber stops of the rear axle. | |
4 | Switch off ignition | ||
5 | Detach wheels from the rear axle | Only if required. | |
6 | Remove left drive axle pressure sensor (B20) or right drive axle pressure sensor (B21). | Only on vehicles with code J3Z (Axle load measuring system), or with code Q3Z (Frame lowering, with residual bellows pressure regulation), or with code S1F (Roll Control Assist). | |
7 | Remove compressed-air connector (2) | ||
8 | Remove clip (3) | ||
9 | Raise vehicle at the rear by the frame and support | Only if the air suspension bellows (1) cannot be removed. | |
10 | Remove air suspension bellows (1) | | |
| Install | ||
11 | Insert air suspension bellows (1) | | |
Make sure that the pin (4) for locating the air suspension bellows (1) is seated in the hole. Do not pull the air suspension bellows (1) apart. | |||
12 | Lower vehicle at rear by frame | Only if the vehicle was raised at the rear by the frame. | |
13 | Install clamp (3) | ||
14 | Attach compressed air connector (2) | ||
15 | Install left drive axle pressure sensor (B20) or right drive axle pressure sensor (B21) | Only on vehicles with code J3Z (Axle load measuring system), or with code Q3Z (Frame lowering, with residual bellows pressure regulation), or with code S1F (Roll Control Assist). | |
Use new O-ring. | |||
16 | Install wheels on rear axle | Only if the wheels were removed. | |
17 | Switch on ignition | ||
18 | Move vehicle to driving level using level control system operating unit | ||
19 | Switch off ignition | ||
| Check | ||
20 | Check compressed air connector (2) for leaks | Use commercially available leak detector spray. | |
21 | Check left drive axle pressure sensor (B20) or right drive axle pressure sensor (B21) for leaks | Only on vehicles with code J3Z (Axle load measuring system), or with code Q3Z (Frame lowering, with residual bellows pressure regulation), or with code S1F (Roll Control Assist). | |
Use commercially available leak detector spray. | |||
22 | Remove wheel chocks |
Referenced documents
- ah0018n000101a Notes on compressed air connection systems
- ah0060n010001b Special instructions for lifting and supporting vehicle
- ar4010w1100h Remove/install wheels
- as0000z003201a Risk of death caused by vehicle slipping or toppling off during lifting
- as3222z000101a Risk of death from lowering vehicle when working between wheels and body. Risk of injury from pinching or crushing when working on the air suspension.